# Python循环结构中else用法
add = "http://c.biancheng.net/python/"
i = 0
while i < len(add):
    print(add[i], end = "")
    i = i + 1
else:
    print("\n执行 else 代码块")
print()

for i in add:
    print(i, end = "")
else:
    print("\n执行 else 代码块")
